Top Qt (2024) frequently asked interview questions

Qt Framework is a cross-platform application development framework that is widely used in the development of GUI applications. If you are applying for a position that involves the development of Qt applications, you should be prepared to answer questions about your experience and knowledge of the Qt Framework. In this article, we will review some of the most common Qt Framework interview questions and provide some tips on how to answer them.

Qt QML Interview Questions and Answers 2019 | Qt QML Interview Questions | Wisdom Jobs

Interviews for Top Jobs at QuikTrip

Clerk Interview

Application

I interviewed at QuikTrip

Interview

the interviews are Quick and painless. there is a math test that is easy. the full time math test is a little harder but for part time you can even use a calculator.

Interview Questions

  • Why do you want to work here?

Part Time Clerk Interview

Application

I applied online. The process took 6 days. I interviewed at QuikTrip in Jul 2022

Interview

I just took a math test and then went in for an in person interview. The people there were very friendly. They’ll call you back if you got the job.

Interview Questions

  • Why should we hire you over someone else?

Night Assistant Manager Interview

Application

I applied online. The process took 3 days. I interviewed at QuikTrip (Italy, TX) in May 2022

Interview

Very intense. Asked many direct questions. They did not seem to be playing around. Despite being a gas station, everything was taken very seriously. Very direct questions. Was told that facial hair and tattoos could not be shown and had to be clean shaven.

Interview Questions

  • How did I handle a difficult customer?

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“In my last job, I worked at a fast-food restaurant. In my last role, I took the customer’s orders, prepared food, made sure inventory was adequately stocked and performed cleaning duties. I gained valuable work experience in dealing with customers, managing cash, inventory, and cleaning. I feel my previous work experience will help me excel as a clerk.”

Sadique Ali’s C++ Blog ..Quest For Knowledge…

Here I will share some interview questions that usually asks when you go for QT/C++ Interviews

What is QT?

Qt is a cross platform C++ framework used for creating UI , networking ,multi threaded programming, database programming,XML parsing,JSON parsing, programs. QT is supported by a varieties of platforms including windows,Linux,mac,Android ,embedded systems.QT’s moto is write once compile any where.Qt is currently being developed by The Qt Company, a publicly listed company.Qt is available under both commercial licenses[4] and open source[13] GPL 2.0, GPL 3.0, and LGPL 3.0 licenses.

Please see the official QT link https://www.qt.io/ to see more.

How QT achieves platform independence?

QT’s moto is write once compile any where.QT is supported by a varities of platforms including windows,linux,mac,Android ,embeded systems.. QT achieves this platform Independence by using the conditional compilation and pre processing properties of the c++ compiler. Qt programs uses additional keywords which is not natively available in c++ language and Qt source file is preprocessed by a special compiler called meta Object compiler (MOC) to generate the c++ source code corresponding to qt c++ input file.so qt source file processed by MOC compiler and and generate intermediate c++ source file which is then compiled by native c++ compiler. Also the source code specific to platform is handled by preprocessor directives #if defined(WIN32) //do windows specific stuffs #elif(UNIX) /* Do linux stuff */ #elif(MAC) /* Do Mac stuff */ #endif

What are the two types GUI application available in QT?

1)widget based:traditional widget based Ui App 2)Qt Quick App: QML based UI for fancy UI’s mainly meant for mobile and touch screen devices

How signals and slot work? Event handling in Qt is done through signals and slots;it follows observer pattern. Connect is used to connect two objects for signals and slots. below is the syntax for it

QObject::connect ( const QObject * sender, const char * signal, const QObject * receiver, const char * method, ConnectionType type );

For example, if user presses a quit button he wants to terminate the application. a user’s click on Quit makes the application terminate. In code, this is written as connect(button, SIGNAL (clicked()), qApp, SLOT (quit()));

fifth arg is the connection type to specify the synchronous behavior of the slot to be called upon emitting the signal.by default it will be synchronous, if you want to make asynchronous explicitly pass the connection type as “QueuedConnection” as fifth arg.This will be useful in multi threaded application, where signals are emitted by an object in one thread and received by an object in another thread.

what is Q_OBJECT macro? Base class in QT is QObject, and in order to use features in QT(signals-slots, qobject_cast, MetaObjects, Parent Child representation) a class should be derived from QObject and also Q_Object macro should be used in private section of the header file.Also a class deceleration containing Q_Object macro will only be processed by MOC compiler.so if you want to use QT feature like signals-slots, qobject_cast, MetaObjects, Parent Child representation in a class don’t forget to use Q_OBJECT macro.This Q_OBJECT macro will be expanded by MOC compiler to generate c++ specific code to work all QT specific codes.

What is the significance of QObject in QT?

QObject class is the base class of all QT classes (Except some classes like QString,).Many of the Qt features (signals-slots, qobject_cast, MetaObjects, Parent Child representation) are implemented with standard C++ techniques, based on inheritance from QObject. QObjects organize themselves in object trees (Follows composite design pattern). When you create a QObject with another object as parent, the object will automatically add itself to the parent’s children() list. The parent takes ownership of the object; i.e., it will automatically delete its children in its destructor. QObjects copy constructor and Assignment Operator is private; so we cannot copy a QObject or Assign it to another.

to be continued

Define Qt?Qt is widely used in developing application software that will be running on various software and hardware platforms.It is a cross platform application framework, used for creating UI , networking, multi thread programming, etc.Qt is comprised of several classes from the Qt object model.

A slot are virtual cases used when a signal is connected to when it is emitted.We can connect more that one signal in a single slot, whenever one of those connected single is emitted.As Callbacks helps in processing functions with the correct arguments.

FAQ

What questions do they ask at a QT interview?

Clerk Interview

They just ask you about yourself and then your availability. They also ask if you have transportation. But before that you have to pass the math test.

What are the 10 most common interview questions and answers for?

Top 10 Interview Questions and Best Answers
  • Tell Me About Yourself. …
  • Why Are You the Best Person for the Job? …
  • Why Do You Want This Job? …
  • How Has Your Experience Prepared You for This Role? …
  • Why Are You Leaving (or Have Left) Your Job? …
  • What Is Your Greatest Strength? …
  • What Is Your Greatest Weakness?

Why do you want to work at QT answer?

Interview Answers

I excel in customer service, because I know if I can make that one person want to come back to my store simply because of the care i provided, then my time is well spent. In such a busy environment, I find I don’t stress under pressure.

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